A-A Backflow Testing and Maintenance

Call (800) 342-5104

Backflow device testing and maintenance for Los Angeles and Orange County for over 35 years!

We do start-up tests on short notice!
Call us at (800) 342-5104

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custom backflow device cages made in Torrance by A-A Backflow

We custom make cages to protect your devices.
Learn more here.

A-A Backflow Testing and Maintenance, located in Torrance, is a superior service provider for property managers, industrial plant managers, government, commercial, maintenance providers, residences and others that need to comply with the annual testing of backflow devices required under California state law. We are the backflow company for your needs!

We use County approved procedures to provide HONEST tests to insure that your device meets the required standards. You are welcome to witness any test!

We work on all approved devices and can replace any obsolete device with one that is on the most current approved list.

Backflow devices are designed to maintain water quality by keeping pollutants and contaminates from entering the drinking water supply. Water Districts are required by the EPA and the State of California to implement a Cross Connection Control Program. We help reduce your liability by making sure your device is working properly.

Some examples of pollutants and contaminants are irrigation water, pesticides,  cleaning agents, water conditioners for boilers, X-ray developer, fire supply lines, soda machines, etc.

We test and service the following types of backflow devices:

  • Pressure Vacuum Break PVB
  • Spill Resistant Vacuum Break SPVB
  • Double Check DC
  • Reduced Pressure Principle RPZ

A-A Backflow provides backflow device testing, repair and replacement throughout Los Angeles County and Orange County.


Full time Backflow tester or plumbing experience will train.

Straightline Backflow, Inc. has merged its operations with A-A Backflow Testing and Maintenance effective October 2, 2023. A-A Backflow is committed to providing excellent service to Straightline customers and to make the transition easy. Please call us with any questions or send your forms to info@aabackflow.com. We have your contact information and files and will update you in our system. Let us know if you need a W-9 or other information to update your AP information.

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